Proton Authenticator vs SAP Authenticator

Proton Authenticator generates time-based one-time codes for two-factor authentication, adding a code at login to help secure accounts. It can display codes without an internet connection, and a Proton Account is not required to use it. Signing in is optional and enables code syncing across devices. Users can import codes from Google Authenticator, 2FAS, Aegis Authenticator, Bitwarden Authenticator, Ente Auth, and LastPass Authenticator, then export their codes from the app. Backups can be stored locally or in the cloud, with end-to-end encrypted sync between devices. Proton says its servers cannot access synced data in unencrypted form; when sync is on, entries are protected with 256-bit AES-GCM. The app is open source, and its vault can be unlocked with face or fingerprint recognition. It is available for Android, iOS, Linux, macOS, and Windows; Android is also available through F-Droid. Proton Authenticator is free on all listed platforms, with no ads or tracking.

SAP Authenticator is a free mobile app that generates time-based passcodes for systems requiring one-time password authentication. Each code works for one login attempt, and the app creates a new one every 30 seconds. A passcode can act as a second factor or as an alternative password. The app supports multiple accounts, which can be configured by scanning a QR code or entering a secret key. Online account setup is also available only with SAP Authenticator. For accounts set up online, administrators add applications; users cannot maintain those applications themselves. Users can save applications in the app and access them later through mobile single sign-on without another authentication step. SAP documentation describes OTP authentication and mobile SSO use with SAP Single Sign-On and SAP Fiori Client. The app runs on iOS and Android and can be protected with a password. SAP recommends protecting the app with a logon password and using two-factor authentication when the scenario allows it.